Water and air relief valve.



J. G. MIDGLBY. WATER AND AIR RELIEF VALVE. APPLICATION FILED APR. 17, 1906.

930,207. Patented Aug. 3,1909.

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jon'Ne. MIDGLEY, or SALTYLAKE CITY, UTAH, ASSIGNOR TO WARREN WEBSTER & 00., OF

CAMDEN, NEW JERSEY, A

CORPORATION NEW JERSEY.

WATER AND BELIEF VALVE.

To all whom it may concern:

Be it known that 1, JOHN G. MIDGLEY, of Salt Lake City, county of Salt Lake, and State of Utah, have invented an Improvement in VVaterand Air Relief Valves, of which the following'is a specification.

This invention relates to that class of valves, in which a movable floator motor controlled by the accumulation of water of condensation. in the valve body controls the outlet, andis provided with-a tubular guide, which communicates withs-theoutlet, and through'which air passes when the valve is closed.

It is (if-importance in valves of this'character that the friction between thefloat or motor and its guides shouldbe reduced to a minimum, and at the same time that the vent or clearance provided for the passage of air through the tubular portion should be as small as possible to prevent the waste of steam and yet should not become cloggedby small particles of matter that may be carried into the valve.

It is the object of this invention to accomplish these results, and by the improvements hereinafter set forth, I am able to reduce the friction, and the area of the air vent through the tubular portion While rendering said vent less liable to become clo ged by particles of matter, and]: am also ab e to keep the guiding parts clean and free from adhering particles of sticky or oily matter, which would tend to interfere with the free movement of the float ormotor in opening and closing the valve.

In the drawings, Figure 1 is a vertical sectional view of a valve embodying my invention; Fig. 2 is a similar view showing a different form, and Fig. 3 is a horizontal section on the line A-A of Fig. 2.

The valve-body a may be of the usual character, having an inlet 1) and an outlet 0. It is shown 0 en at the top and provided with a remova le screw threaded cap (1.

e is the float or motor within the valve body, having a-tubular portion g,the lower end of'which constitutes the valve-piece f Speeificaticn ofEetters Patent. Application filed April 17, 1906. Serial No. 312,077.-

since it is only the- Patented Aug. 3, 1909.

tially greaterthan that of the 'rod so .as to leave a substantial clearance between the two, but the tubular'portion is provided with oneor more disks s, t each having-a small hole through which the rod extends with sufficient clearance to ermit the free movement of the float, and a 0rd the necessary vent for the discharge of air. In the' construction shown in Fig. 1 two disks 8 and t are used, arranged at the upper and lower brtion's of the tube to guide it and the float 0th at the top and bottom. In the construction shown in Figs. 2 and 3, however, only the upper disk sis used and-the float is guided at the bottom by small rejections n on the lower part of the float w ich move on the inclosing walls of the valve bod 1 By the use of a small rod and theguiding disks, the frictional area is greatly reduced, small area of contact be tween the edges of the disk and rod, and at the same time the area of the vent due to the slight clearance between the rod and disks is reduced to a minimum. With alarge rod fittingthe tube, this vent is formed by the annular open space afforded by the difference between the internal diameter-of the tube and the diameter of the rod. As the clear-.

ance must be substantial in extent to prevent binding and to allow small particles to pass through, it follows that, by reason of the relatively large diameter of the annular space, the 'area of-the' vent is larger than is required for the discharge of the air, and ermits the escape and waste of steam. the rod and disks, this annular space is of very much smaller diameter and conse-- ith quently the clearance between the rod and edges of the disks may be substantially 1ncreased to reduce friction and afford greater width for the assage of particles of matter, while the tota area of t e vent is reduced and the waste of steam is prevented. The disks also perform the function of cleaning the rod and loosening from it particles of matter that may adhere to its surface. The increased width of the clearance permits the particles to pass through the. disks more easily into the wide clearance between the bod of the tube and the rod.

iere a long rod is used as in Fig. 1, I prefer to have it project into the opening in the valve-seat as shown. It follows that the cap cannot be screwed on until the end of tionary rod of relativel walls of the tube,

tween the outlet and the-upper part of the interior of the valve when said valve-piece is seated, a motor carrying said tube, a stationary rod of' relative y small diameter extending from the'top of the valve down into.

said tube and leaving a relatively wide clearance between said rod and the surrounding walls of the tube, and a thin cleaning piece carried by said tube and acting on the rod to scrape adhering matter from its surface when saidtube is raised and lowered by the motor.

2. In a-water and air relief valve for steam heating systems, the combination of a valve body forming a chamberhaving an inlet and an outlet, an elongated tube carrying the valve-piece which controls said outlet and forming a communicating passageway between the outlet and the upper part of the interior of the valve when said valve-piece is-seated, a'motor carrying said tube, a stay small diameter extcnding from the top of the valve down into said tube and leaving a'relatively Wide clearance between said rod and the surrounding and a disk carried by said tube and extending over the tubular opening therein but having a small 0 ening for the rod, said opening being slightly larger in' diameter than said rod, so as to leave a relatively small annular clearance.

3. In a water and air relief valve for steam "valve piece heating systems, the combination of a valve body forming a chamber having an inlet and seated, a motor carrying said tube, a stationary rod' of relatively small diameter ex tending from the top of the valve into said tube and leaving a relatively'wide clearance between said rod and the surrounding walls of the tube, and disks near the to and bottom and each extending over the tu ular opening therein but having a small 0 ening for the rod, said openin s being slig tly larger in diameter than sald,

rod, so as to leave a relatively small annular clearance.

4. In a water and air relief valve for steam heating systems, the combination of a valvebody forming a chamber having an inlet and an outlet, an elongated tube carrying the which controls said outlet and formlng a communicating passageway between the outlet and the up er art of the interior of the valve when sai va ve-piece is seated, a motor carrying said tube, a removable cap for said valve-body, a rod of relatively small diameter carried by said cap and extendin down into said tube and leaving a relativeIy wide clearance between said rod and the surrounding walls of the tube, and a disk carriedby said tube and extending over the tubular opening therein but having 'a small opening for the rod, said opening being slightly larger in diameter than said rod, so as to leave a relatively small annular clearance.

In testimony of which unto set my hand.

JOHN G. MIDGLEY. Witnesses:

ERNEST BROWN, L. MORGAN.

carried by said tube invention, I here- 

